Antislagging superheater boiler



" June 19, 1934.

c. w. GORDON 1,963,741

ANTISLAGGING SUPERHEATER BOILER Filed April 7. 1933 @QDQQDQQOQZ (bar/e: /l. @ra aa, INVENTOR BY 'Q/QL'ML ATTORN EY Patented June 19, 1934 UNITED STATES PATENT OFFICE Charles W. Gordon, Munster, Ind., assignor to The Superheater Company, New York, N. Y.

Application April 7, 1933, Serial No. 664,880

3 Claims.

The present invention relates to superheater boilers adapted for use with slagging fuels.

superheater boilers are in common use in which superheater units are arranged in lanes in the 5 banks of generating tubes parallel to the direction of flow of gases through such bank. Such arrangements have been very successful on the whole but difficulties with slagging have been encountered at times with such arrangements when using certain grades of coal.

It is the principal object of the present invention to provide an arrangement of superheater units within a generating bank adapted to obviate or minimize difficulties from slagging even when inferior grades of coal are used.

In order that my invention, together with its objects and advantages, may be readily and fully understood, I will now describe by way of example and in connection with the accompanying drawing a superheater boiler selected from a number of possible embodiments of my invention. In the drawing,

Fig. 1 is a sectional elevation of a superheater boiler within my invention.

Fig. 2 is a fragmentary section taken on a line 22 of Fig. 1.

The superheater boiler 10 illustrated in Fig. 1 is of the Stirling type having a front bank 12 of generating tubes 14, 14 arranged at an inclination to the vertical above a furnace 16 as is usual in such boilers. In Fig. 2, the entrance of the furnace gases to the bank 12 is indicated by arrows 18, 18 which are placed at the furnace face of such bank.

The means illustrated for superheating steam from the boiler 10 comprises a header 20 for saturated steam, and a header 22 for superheated steam. Units 24, 24 conduct the steam from header 20 to header 22 and extend into the bank 12 in position to receive heat from the furnace gases. In order, however, that the particles of slag from the furnace gases may not adhere to superheater units 24, the portions of such units within bank 12 are placed each between two successive generating tubes 14 in the direction perpendicular to the furnace face of bank 12 and in position to be largely shielded by the generating tubes from slag particles. As shown, units 24 are of the single loop type and the lower portion of each unit lies between two generating tubes 14 as just stated and preferably substantially in the center lines of the rows of tubes 14. However, I do not limit myself as to the exact position of the units or to units of the single loop type. As shown, three single loop units are shown in a given row of tubes 14, but the number of units per row is immaterial to the invention. The upper portions 24a of units 24 necessarily must pass between the rows of tubes 14 and into the path of furnace gases. However, such upper portions extend substantially vertical so as to pass behind the front drum 26 of the boiler so that they diverge rearwardly from the furnace face of bank 12 and soon pass out of the zone in which slagging is apt to occur.

While I have shown all the loops of superheater units directly between adjacent generating tubes in the direction of the flow of furnace gases I do not limit myself to this, since the slagging effect in the zone along the rear edge of the front bank is greatly reduced over what it is toward the furnace face of such bank.

What I claim is:

1. The combination of a boiler having generating tubes arranged in rows perpendicular to the furnace face of the tube bank and spaced apart in such rows and superheater units having loops between generating tubes in said rows.

2. The combination of a boiler having a vertically inclined bank of generating tubes, said tubes arranged in rows perpendicular to the furnace face of said bank and spaced apart in the rows, and a plurality of single loop superheater units each having its lower portion lying between adjacent generating tubes in one of said rows and substantially in the plane of such row.

3. The combination as set forth in claim 2 and in which the upper portions of the superheater elements incline away from the furnace face of the bank.

CHARLES W. GORDON. 

